描述
Santoprene 111-45 is a soft, black and versatile thermoplastic vulcanizate (TPV) from Celanese designed for general-purpose elastomeric applications that require rubber-like flexibility together with conventional thermoplastic processing.
Celanese describes this grade as a polyolefin-based TPV combining good physical properties and chemical resistance for a wide range of injection-molding applications. The current Celanese TPV Product Finder also places Santoprene 111-45 in the general-purpose extrusion and molding category.
The grade has a Shore A hardness of approximately 49, making it one of the softer black Santoprene general-purpose materials. It is therefore well suited to applications where sealing conformity, flexibility and soft elastomeric response are more important than high stiffness.
Current grade-specific data lists approximately 340% elongation at break, 3.5 MPa tensile stress at break and 1.4 MPa tensile stress at 100% elongation.
These values show that Santoprene 111-45 can undergo substantial deformation while maintaining useful mechanical integrity.
Celanese specifically recommends the grade for applications requiring excellent flex-fatigue resistance and also highlights excellent ozone resistance.
Flex-fatigue resistance is important in parts that repeatedly bend, flex or compress during service, such as seals, grommets, diaphragms and flexible protective parts.
Ozone resistance is especially important in automotive, outdoor and industrial environments where conventional elastomers may crack or lose performance after prolonged atmospheric exposure.
Low-temperature flexibility is another strong characteristic. Current data lists a brittleness temperature of approximately -62°C under both ASTM D746 and ISO 812-related testing.
This makes Santoprene 111-45 suitable for applications that may experience severe cold while still needing an elastomeric response.
Compression set is also useful for sealing applications. Current Celanese data lists approximately 11% compression set at 23°C for 24 hours and approximately 35% at 125°C for 70 hours.
A low compression-set value helps a seal recover after prolonged compression and maintain contact pressure against a mating surface.
The grade is polyolefin based and Celanese states that it is recyclable within the manufacturing stream. This provides an important processing advantage compared with fully crosslinked thermoset rubber, subject to normal quality and contamination controls.
Santoprene 111-45 is also UL recognized under Celanese file references QMFZ2.E80017 and QMFZ8.E80017.
The current flame classification is HB at 1 mm thickness, so the grade should be treated as a general-purpose elastomer rather than a dedicated flame-retardant TPV.
For more TPV products, visit our TPV Thermoplastic Vulcanizates Product Category →.
For the current Celanese Santoprene portfolio, see the Official Celanese Santoprene & Geolast TPV Product Finder →.
Key Features of Santoprene 111-45
| Feature | Engineering Benefit |
|---|---|
| Shore A 49 | Soft elastomeric response for sealing and flexible components |
| Excellent Flex-Fatigue Resistance | Suitable for repeated bending, movement and compression |
| Excellent Ozone Resistance | Supports outdoor and automotive service |
| -62°C Brittleness Temperature | Strong low-temperature flexibility |
| 340% Elongation at Break | Allows substantial deformation without brittle failure |
| Low Compression Set | Supports long-term sealing recovery |
| Good Chemical Resistance | Useful for many industrial and automotive environments |
| Shear-Dependent Flow | Flow improves as shear rate increases |
| Injection Moldable | Suitable for conventional thermoplastic molding equipment |
| General-Purpose Extrusion / Molding Positioning | Broad use across sealing and flexible-component applications |
| UL Recognized | Current Celanese documentation references E80017 |
| Polyolefin Based | Low density and efficient thermoplastic processing |
| Manufacturing-Stream Recyclability | Helps reduce controlled production scrap |
Typical Applications for Santoprene 111-45
Santoprene 111-45 is suitable for a broad range of sealing and flexible-component applications.
| Application Area | Typical Use |
|---|---|
| Seals & Gaskets | Soft static and dynamic sealing parts |
| Automotive Grommets | Flexible protective and sealing components |
| Plugs & Bumpers | Soft impact and protection parts |
| HVAC Flapper Door Seals | Flexible sealing elements with repeated motion |
| Air Filter Gaskets | Compliant sealing around filter housings |
| Motor Brush Holders / Flexible Supports | Elastomeric protection and vibration-management functions |
| Consumer Electronics Parts | Soft protective and sealing components |
| Printer & Floor-Care Parts | Flexible industrial/consumer components |
| Industrial Seals | General-purpose chemical- and ozone-resistant sealing |
| Flexible Protective Components | Boots, covers and soft molded parts |
Typical Properties of Santoprene 111-45
Physical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Density | 960 kg/m³ / 0.960 g/cm³ | ISO 1183 |
| Shore A Hardness, 15 s | 49 | ISO 48-4 / ISO 868 |
| Resin Identification | TPV | ISO 1043 |
| Part Marking Code | >TPV< | ISO 11469 |
| Color | Black | Manufacturer information |
| Product Form | Pellets | Manufacturer information |
Mechanical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Tensile Stress at 100% Elongation | 1.4 MPa | ISO 527-1/-2 or ISO 37 |
| Tensile Stress at Break | 3.5 MPa | ISO 527-1/-2 or ISO 37 |
| Elongation at Break | 340% | ISO 527-1/-2 or ISO 37 |
| Brittleness Temperature | -62°C | ASTM D746 |
| Low-Temperature Brittleness | -62°C | ISO 812 |
| Compression Set, 23°C / 24 h | 11% | ISO 815 |
| Compression Set, 125°C / 70 h | 35% | ISO 815 |
The 11% compression set at 23°C / 24 h is an important indicator for soft sealing parts that must recover after compression.
Electrical Properties
| Property | Typical Value | Test Method |
|---|---|---|
| Relative Permittivity @ 60 Hz | 2.4 | IEC 62631-2-1 |
| Electric Strength, Short Time, 2 mm | 27 kV/mm | ASTM D149 |
Flammability
| Property | Typical Value | Test Method |
|---|---|---|
| Burning Behavior | HB | IEC 60695-11-10 / UL 94 |
| Tested Thickness | 1 mm | IEC 60695-11-10 / UL 94 |
| UL Recognition | Yes | UL 94 |
Why Choose Santoprene 111-45?
The strongest reason to choose Santoprene 111-45 is its soft sealing performance combined with good durability.
A Shore A hardness of 49 provides high conformity against mating surfaces, which is useful for seals and gaskets with uneven geometry or low closing force.
Its 340% elongation allows molded parts to stretch substantially during assembly and use.
The -62°C brittleness temperature is particularly valuable for applications that may see severe winter conditions or cold storage.
Excellent flex-fatigue resistance helps parts survive repeated motion, making the grade suitable for moving seals, flapper-door components and flexible protective parts.
Excellent ozone resistance supports long-term outdoor or automotive exposure.
Compression-set performance is another advantage. At room temperature, the current 11% value indicates strong recovery after prolonged compression.
The material also benefits from thermoplastic processing. Unlike conventional thermoset rubber, Santoprene 111-45 can be processed on conventional thermoplastic equipment without a separate vulcanization step during molding.
Because the grade is polyolefin based and recyclable within the manufacturing stream, controlled scrap can potentially be reused according to the production specification.
For customers requiring a black, soft, approximately 49 Shore A TPV for general-purpose seals and flexible molded components, Santoprene 111-45 is a practical grade to evaluate.
Processing Guidelines for Santoprene 111-45
Current Celanese grade data provides the following injection-molding guidance for Santoprene 111-45.
| Processing Parameter | Celanese Guidance |
|---|---|
| Drying Temperature | 82°C |
| Drying Time | 3 hours in a dehumidified dryer |
| Maximum Processing Moisture | 0.08% |
| Maximum Regrind Level | 20% |
| Optimum Melt Temperature | 215°C |
| Minimum Melt Temperature | 165°C |
| Maximum Melt Temperature | 265°C |
| Optimum Mold Temperature | 50°C |
| Minimum Mold Temperature | 20°C |
| Maximum Mold Temperature | 80°C |
| Back Pressure | 0.517 MPa |
| Ejection Temperature | 90°C |
Celanese additionally recommends desiccant drying for approximately 3 hours at 80°C.
The broader Santoprene TPV family processing window is approximately 175–230°C, while the exact grade sheet provides a wider grade-specific injection window of 165–265°C with an optimum around 215°C.
Shear-Dependent Flow
Santoprene 111-45 is shear dependent. As shear rate increases, apparent melt viscosity decreases.
Processors should pay close attention to screw speed, injection speed, gate size, back pressure, melt temperature, mold temperature, venting, holding pressure and cooling time.
Celanese recommends an SPI/SPE #3 mold finish and specifically notes not to polish the mold surface excessively.
Material Compatibility
Celanese states that Santoprene TPV is incompatible with acetal (POM) and PVC.
When changing between these materials, the barrel, screw, nozzle, hot runner and other material-contact surfaces should be purged thoroughly.
Santoprene 111-45 vs. Santoprene 111-35
| Feature | Santoprene 111-45 | Santoprene 111-35 |
|---|---|---|
| Material Family | TPV | TPV |
| Color | Black | Black |
| Product Positioning | General purpose | General purpose |
| Shore A Hardness | 49 | 38 |
| Elongation at Break | 340% | 330% |
| Tensile Stress at Break | 3.5 MPa | 2.9 MPa |
| Tensile Stress @ 100% Elongation | 1.4 MPa | 1.0 MPa |
| Main Selection Difference | Firmer, stronger soft TPV | Softer, more compliant TPV |
Choose Santoprene 111-45 when the part needs more support and tensile strength while remaining soft.
Choose Santoprene 111-35 when maximum softness and compliance are more important.
Related Products
Santoprene 111-35 – Softer black general-purpose TPV with approximately Shore A 38 hardness.
Santoprene 211-45 – Natural-color counterpart in the same general-purpose hardness range.
Santoprene 101-55 – Black general-purpose TPV with approximately Shore A 60 hardness and higher tensile strength.
View More TPV Thermoplastic Vulcanizates →
Technical Documents for Santoprene 111-45
| Document Type | Description |
|---|---|
| TDS | Current Celanese physical, mechanical, electrical, flammability and processing data |
| SDS | Safety Data Sheet |
| UL Information | QMFZ2.E80017 / QMFZ8.E80017 recognition |
| Santoprene Product Finder | Grade comparison and application positioning |
| Processing Guidance | Injection-molding conditions and Santoprene TPV processing notes |
| COA | Batch-specific quality information where available |
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FAQ About Santoprene 111-45
Q1: What is Santoprene 111-45?
Santoprene 111-45 is a soft black general-purpose TPV from Celanese with approximately Shore A 49 hardness. It combines rubber-like flexibility with thermoplastic injection-molding capability.
Q2: What is the hardness of Santoprene 111-45?
The current Celanese value is approximately Shore A 49.
Q3: What is the elongation at break?
Current grade data lists approximately 340% elongation at break.
Q4: What is the tensile stress at break?
The current tensile stress at break is approximately 3.5 MPa.
Q5: How does Santoprene 111-45 perform at low temperature?
The current brittleness temperature is approximately -62°C, indicating excellent low-temperature flexibility for a soft TPV.
Q6: What is the compression set?
Current data lists approximately 11% at 23°C / 24 h and 35% at 125°C / 70 h.
Q7: Is Santoprene 111-45 ozone resistant?
Yes. Celanese specifically identifies excellent ozone resistance as a key feature of the grade.
Q8: Is Santoprene 111-45 suitable for sealing applications?
Yes. Celanese specifically identifies the grade for sealing applications, and its low hardness and compression-set behavior make it suitable for many soft sealing designs.
Q9: What processing temperature is recommended?
The current grade-specific injection data lists an optimum melt temperature of approximately 215°C, with a published range of approximately 165–265°C. Celanese also gives a broader Santoprene TPV family processing window of approximately 175–230°C.
Q10: What is the difference between Santoprene 111-45 and 111-35?
Both are black general-purpose TPV grades. Santoprene 111-45 is harder at Shore A 49 and has higher tensile stress, while 111-35 is softer at approximately Shore A 38.
Request Santoprene 111-45 Price & Technical Support
For pricing, availability, technical documents or application support for Santoprene 111-45, please provide:
- Required quantity
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- Automotive, industrial, appliance or consumer application
- Seal, gasket, grommet or molded-part design
- Required Shore hardness
- Continuous and peak operating temperature
- Minimum service temperature
- Compression-set requirement
- Chemical or fluid exposure
- Outdoor / ozone exposure
- Injection-molding or extrusion process
- UL documentation requirement
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